Serena Williams argues

Serena Williams argues

Serena Williams of the US talks to US Open head referee Brian Earley after being penalized in her match against Kim Clijsters from Belgium during their Women's Semi-Final US Open match at the USTA Billie Jean King National Tennis Center September 12, 2009 in New York. (Photo by TIMOTHY A. CLARY/AFP/Getty Images)

Serena Williams of the US talks to US Open head referee Brian Earley after being penalized in her match against Kim Clijsters from Belgium during their Women's Semi-Final US Open match at the USTA Billie Jean King National Tennis Center September 12, 2009 in New York. (Photo by TIMOTHY A. CLARY/AFP/Getty Images)

Serena Williams of the US talks to US Open head referee Brian Earley after being penalized in her match against Kim Clijsters from Belgium during their Women's Semi-Final US Open match at the USTA Billie Jean King National Tennis Center September 12, 2009 in New York. (Photo by TIMOTHY A. CLARY/AFP/Getty Images)